askirmas /
postcss-d-ts
| Conditions | 10 |
| Total Lines | 48 |
| Code Lines | 41 |
| Lines | 0 |
| Ratio | 0 % |
| Changes | 0 | ||
Complex classes like rewrite.ts ➔ rewrite often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
| 1 | import {createReadStream} from 'fs' |
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| 13 | |||
| 14 | async function rewrite(filename: string, lines: string[], eol: string, checkMode: boolean) { |
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| 15 | const {length} = lines |
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| 16 | , fileExists = await $exists(filename) |
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| 17 | |||
| 18 | if (fileExists) { |
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| 19 | const lineReader = createInterface({ |
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| 20 | input: createReadStream(filename), |
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| 21 | crlfDelay: Infinity, |
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| 22 | historySize: 0 |
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| 23 | }) |
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| 24 | |||
| 25 | let isSame = true |
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| 26 | , row = 0 |
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| 27 | |||
| 28 | for await (const line of lineReader) { |
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| 29 | if (line !== lines[row]) { |
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| 30 | isSame = false |
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| 31 | break |
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| 32 | } |
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| 33 | row++ |
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| 34 | } |
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| 35 | |||
| 36 | lineReader.close() |
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| 37 | |||
| 38 | if (isSame) { |
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| 39 | if (lines[row] === "") |
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| 40 | row++ |
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| 41 | if (length === row) |
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| 42 | return |
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| 43 | } |
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| 44 | } |
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| 45 | |||
| 46 | if (checkMode) |
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| 47 | throw new Error(`Content of "${filename}" should be another`) |
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| 48 | |||
| 49 | const tempFile = await tempFileName() |
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| 50 | , fd = await $open(tempFile, "w") |
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| 51 | |||
| 52 | for (let i = 0; i < length; i++) |
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| 53 | await $write(fd, `${ |
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| 54 | i ? eol : '' |
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| 55 | }${ |
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| 56 | lines[i] |
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| 57 | }`) |
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| 58 | |||
| 59 | await $close(fd) |
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| 60 | await $rename(tempFile, filename) |
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| 61 | } |
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| 62 |
